Observation of an Unusual Upward-Going Cosmic-Ray-like Event in the Third Flight of ANITA

Gorham, P. W.; Rotter, B.; Allison, P.; Banerjee, O.; Batten, L.; Beatty, J. J.; Bechtol, K.; Belov, K.; Besson, D. Z.; Binns, W. R.; Bugaev, V.; Cao, Pinlu; Chen, C. C.; Chen, C. H.; Chen, P.; Clem, J.; Connolly, A.; Cremonesi, L.; Dailey, B.; Deaconu, C.; Dowkontt, P. F.; Fox, B. D.; Gordon, J.; Hast, C.; Hill, B.; Hughes, K.; Huang, J. J.; Hupe, R.; Israel, M. H.; Javaid, A.; Lam, J.; Liewer, K. M.; Lin, Su-Jie; Liu, T. C.; Ludwig, Andrew; Macchiarulo, L.; Matsuno, S.; Miki, C.; Mulrey, K.; Nam, J. W.; Naudet, C. J.; Nichol, R. J.; Novikov, Alexander; Oberla, E.; Olmedo, Manuel; Prechelt, Remy; Prohira, S.; Rauch, B. F.; Roberts, Jason; Romero-Wolf, A.; Russell, John Wellesley; Saltzberg, D.; Seckel, D.; Schoorlemmer, H.; Shiao, Judith Shu-Chu; Stafford, S.; Stockham, J.; Stockham, M.; Strutt, B.; Varner, G.; Vieregg, A. G.; Wang, S. H.; Wissel, Stephanie

doi:10.1103/physrevlett.121.161102

Cited by 127 publications

(186 citation statements)

References 43 publications

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“…The ANITA collaboration has reported observations of two unusual events are consistent with shower characteristics of upward-going taus that decay in the atmosphere [18,19]. In the ANTIA-III run, event 15717147 had an estimated shower energy of 0.56 0.3 −0.2 × 10 9 GeV, and emerged with an azimuthal elevation angle of −35.0 • ±0.3 • -which is to say that the event emerged at around 35 • above the horizon, or around 55 • from the vertical [19]. Additionally, the first run of ANITA in 2016 run produced event 3985267, of shower energy of (0.6 ± 0.4) × 10 9 GeV, which emerged at an azimuthal elevation angle of −27.4 • ± 0.3 • , roughly 63 • from the zenith [18].…”

Section: Introductionmentioning

confidence: 72%

“…Above the Earth, proposed satellite-based instruments sensitive to upward-going air showers include CHANT [14] and POEMMA [15]. The balloonborne ANITA detector [16][17][18][19] is sensitive to neutrino interactions in the Antarctic ice where the Askaryan effect is important. ANITA is also sensitive to tau neutrino charged current interactions in the Earth that produce taus that decay in the atmosphere.…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, the first run of ANITA in 2016 run produced event 3985267, of shower energy of (0.6 ± 0.4) × 10 9 GeV, which emerged at an azimuthal elevation angle of −27.4 • ± 0.3 • , roughly 63 • from the zenith [18]. The interpretation of these unusual events as coming from tau neutrinos is problematic [18,19,26] because of the energies of the showers and the apparent angles of the tau neutrinos that induced them.…”

Section: Introductionmentioning

confidence: 99%

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Anomalous ANITA air shower events and tau decays

et al. 2019

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Two unusual neutrino events in the Antarctic Impulse Transient Antenna (ANITA) appear to have been generated by air showers from a particle emerging from the Earth at angle ∼ 25 • − 35 • above the horizon. We evaluate the effective aperture for ANITA with a simplified detection model to illustrate the features of the angular dependence of expected events for incident standard model tau neutrinos and for sterile neutrinos that mix with tau neutrinos. We apply our sterile neutrino aperture results to a dark matter scenario with long-lived supermassive dark matter that decay to sterile neutrino-like particles. We find that for up-going air showers from tau decays, from isotropic fluxes of standard model, sterile neutrinos or other particles that couple to the tau through suppressed weak interaction cross sections cannot be responsible for the unusual events.

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Section: Introductionmentioning

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Anomalous ANITA air shower events and tau decays

et al. 2019

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“…ANITA uses Askaryan radiation from the ice to look for cosmic neutrinos. ANITA has so far detected two events that resemble the signal of ν τ orν τ coming from the zenith angles of 117.4 • ± 0.3 • [2] and 125 • ± 0.3 • [3] with energies of 0.6 ± 0.4 EeV and 0.56 +0. 4 −0.2 EeV, respectively.…”

Section: Introductionmentioning

confidence: 99%

Explaining the ANITA events by a L_e−L_τ gauge model

Esmaili

Farzan

2019

J. Cosmol. Astropart. Phys.

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The ANITA experiment has registered two anomalous events that can be interpreted as ντ orντ with a very high energy of O(0.6) EeV emerging from deep inside the Earth. At such high energies, the Earth is opaque to neutrinos so the emergence of these neutrinos at such large zenith angles is a mystery. In our paper, we present a model that explains the two anomalous events through a Le −Lτ gauge interaction involving two new Weyl fermions charged under the new gauge symmetry. We find that, as a bonus of the model, the lighter Weyl fermion can be a dark matter component. We discuss how the ANITA observation can be reconciled with the IceCube and Auger upper bounds. We also demonstrate how this model can be tested in future by collider experiments. * arman@puc-rio.br † yasaman@theory.ipm.ac.ir arXiv:1909.07995v1 [hep-ph]

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“…Recently, physical experiments have found supposed evidence that some particles detected in the Antarctic, despised as anomalies because they do not fit into theories, are real and must be taken into account [1,2]. In addition, in order to know better the atomic nucleus, researchers placed a muon in place of an orbital electron and showed that the proton radius is somewhat different from the theoretical predictions [3].…”

Section: Introductionmentioning

confidence: 99%

A Massive Scalar Field under the Effects of the Lorentz Symmetry Violation by a CPT-Odd Nonminimal Coupling

Vitória

Belich

2019

Advances in High Energy Physics

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In this paper, based on the Standard Model Extended gauge sector, we made a non-minimal coupling in the Klein-Gordon equation which characterizes the Lorentz symmetry violation and, through this nonminimal CPT-odd coupling, we investigate the effects of possible scenarios of Lorentz symmetry violation by electrical and magnetic field configurations on a massive scalar field in this background, where, analytically, we determine solutions of bound states.

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Observation of an Unusual Upward-Going Cosmic-Ray-like Event in the Third Flight of ANITA

Cited by 127 publications

References 43 publications

Anomalous ANITA air shower events and tau decays

Anomalous ANITA air shower events and tau decays

Explaining the ANITA events by a L_e−L_τ gauge model

A Massive Scalar Field under the Effects of the Lorentz Symmetry Violation by a CPT-Odd Nonminimal Coupling

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Observation of an Unusual Upward-Going Cosmic-Ray-like Event in the Third Flight of ANITA

Cited by 127 publications

References 43 publications

Anomalous ANITA air shower events and tau decays

Anomalous ANITA air shower events and tau decays

Explaining the ANITA events by a Le−Lτ gauge model

A Massive Scalar Field under the Effects of the Lorentz Symmetry Violation by a CPT-Odd Nonminimal Coupling

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Explaining the ANITA events by a L_e−L_τ gauge model